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FFT double and single precision gives good performance now in multithreaded code.

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This commit is contained in:
paboyle 2016-08-24 15:05:00 +01:00
parent 88be3b39bb
commit ff6da364e8
6 changed files with 298 additions and 492 deletions
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47
configure.ac
View File

@ -10,8 +10,19 @@ m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_LANG(C++)
CXXFLAGS="-O3 $CXXFLAGS"
AC_PROG_CXX
############ openmp ###############
AC_OPENMP
ac_openmp=no
if test "${OPENMP_CXXFLAGS}X" != "X"; then
ac_openmp=yes
AM_CXXFLAGS="$OPENMP_CXXFLAGS $AM_CXXFLAGS"
AM_LDFLAGS="$OPENMP_CXXFLAGS $AM_LDFLAGS"
fi
############ libtool ###############
LT_INIT
############### Checks for header files
@ -29,7 +40,7 @@ AC_TYPE_SIZE_T
AC_TYPE_UINT32_T
AC_TYPE_UINT64_T
############### Options
############### GMP and MPFR #################
AC_ARG_WITH([gmp],
[AS_HELP_STRING([--with-gmp=prefix],
[try this for a non-standard install prefix of the GMP library])],
@ -40,6 +51,8 @@ AC_ARG_WITH([mpfr],
[try this for a non-standard install prefix of the MPFR library])],
[AM_CXXFLAGS="-I$with_mpfr/include $AM_CXXFLAGS"]
[AM_LDFLAGS="-L$with_mpfr/lib $AM_LDFLAGS"])
################## lapack ####################
AC_ARG_ENABLE([lapack],
[AC_HELP_STRING([--enable-lapack=yes|no|prefix], [enable LAPACK])],
[ac_LAPACK=${enable_lapack}],[ac_LAPACK=no])
@ -55,14 +68,27 @@ case ${ac_LAPACK} in
AC_DEFINE([USE_LAPACK],[1],[use LAPACK])
esac
AC_CHECK_LIB([fftw3],[fft_init_threads],
################## FFTW3 ####################
AC_ARG_WITH([fftw],
[AS_HELP_STRING([--with-fftw=prefix],
[try this for a non-standard install prefix of the FFTW3 library])],
[AM_CXXFLAGS="-I$with_fftw/include $AM_CXXFLAGS"]
[AM_LDFLAGS="-L$with_fftw/lib $AM_LDFLAGS"])
#
# What about the MKL library replacement for fftw3 ? How do we know if fftw_execute
# can be found in MKL?
#
AC_CHECK_LIB([fftw3],[fftw_execute],
[AC_DEFINE([HAVE_FFTW],[1],[Define to 1 if you have the `FFTW' library (-lfftw3).])] [ac_fftw=yes],
[ac_fftw=no])
case ${ac_fftw} in
no)
echo WARNING libfftw3 not found FFT routines will not work
;;
yes)
AM_LDFLAGS="-lfftw3 $AM_LDFLAGS"
AM_LDFLAGS="$AM_LDFLAGS -lfftw3 -lfftw3f"
esac
@ -304,19 +330,18 @@ Summary of configuration for $PACKAGE v$VERSION
- compiler version : ${ax_cv_gxx_version}
----- BUILD OPTIONS -----------------------------------
- SIMD : ${ac_SIMD}
- communications type : ${ac_COMMS}
- default precision : ${ac_PRECISION}
- Threading : ${ac_openmp}
- Communications type : ${ac_COMMS}
- Default precision : ${ac_PRECISION}
- RNG choice : ${ac_RNG}
- GMP : `if test "x$have_gmp" = xtrue; then echo yes; else echo no; fi`
- LAPACK : ${ac_LAPACK}
- FFTW : ${ac_fftw}
- build DOXYGEN documentation : `if test "x$enable_doc" = xyes; then echo yes; else echo no; fi`
- graphs and diagrams : `if test "x$enable_dot" = xyes; then echo yes; else echo no; fi`
----- BUILD FLAGS -------------------------------------
- CXXFLAGS:
`echo ${AM_CXXFLAGS} ${CXXFLAGS} | sed 's/ -/\n\t-/g' | sed 's/^-/\t-/g'`
- LDFLAGS:
`echo ${AM_LDFLAGS} ${LDFLAGS} | sed 's/ -/\n\t-/g' | sed 's/^-/\t-/g'`
- LIBS:
`echo ${LIBS} | sed 's/ -/\n\t-/g' | sed 's/^-/\t-/g'`
- CXXFLAGS: "${AM_CXXFLAGS} ${CXXFLAGS}"
- LDFLAGS: "${AM_LDFLAGS} ${LDFLAGS}"
- LIBS: "${LIBS} "
-------------------------------------------------------
"

199
lib/FFT.h
View File

@ -1,3 +1,4 @@
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
@ -28,11 +29,70 @@ Author: Peter Boyle <paboyle@ph.ed.ac.uk>
#ifndef _GRID_FFT_H_
#define _GRID_FFT_H_
#include <Grid/fftw/fftw3.h>
#ifdef HAVE_FFTW
#include <fftw3.h>
#endif
namespace Grid {
template<class scalar> struct FFTW { };
#ifdef HAVE_FFTW
template<> struct FFTW<ComplexD> {
public:
typedef fftw_complex FFTW_scalar;
typedef fftw_plan FFTW_plan;
static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
FFTW_scalar *in, const int *inembed,
int istride, int idist,
FFTW_scalar *out, const int *onembed,
int ostride, int odist,
int sign, unsigned flags) {
return ::fftw_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
}
static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
::fftw_flops(p,add,mul,fmas);
}
inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
::fftw_execute_dft(p,in,out);
}
inline static void fftw_destroy_plan(const FFTW_plan p) {
::fftw_destroy_plan(p);
}
};
template<> struct FFTW<ComplexF> {
public:
typedef fftwf_complex FFTW_scalar;
typedef fftwf_plan FFTW_plan;
static FFTW_plan fftw_plan_many_dft(int rank, const int *n,int howmany,
FFTW_scalar *in, const int *inembed,
int istride, int idist,
FFTW_scalar *out, const int *onembed,
int ostride, int odist,
int sign, unsigned flags) {
return ::fftwf_plan_many_dft(rank,n,howmany,in,inembed,istride,idist,out,onembed,ostride,odist,sign,flags);
}
static void fftw_flops(const FFTW_plan p,double *add, double *mul, double *fmas){
::fftwf_flops(p,add,mul,fmas);
}
inline static void fftw_execute_dft(const FFTW_plan p,FFTW_scalar *in,FFTW_scalar *out) {
::fftwf_execute_dft(p,in,out);
}
inline static void fftw_destroy_plan(const FFTW_plan p) {
::fftwf_destroy_plan(p);
}
};
#endif
class FFT {
private:
@ -40,6 +100,10 @@ namespace Grid {
GridCartesian *sgrid;
int Nd;
double flops;
double flops_call;
uint64_t usec;
std::vector<int> dimensions;
std::vector<int> processors;
std::vector<int> processor_coor;
@ -49,6 +113,9 @@ namespace Grid {
static const int forward=FFTW_FORWARD;
static const int backward=FFTW_BACKWARD;
double Flops(void) {return flops;}
double MFlops(void) {return flops/usec;}
FFT ( GridCartesian * grid ) :
vgrid(grid),
Nd(grid->_ndimension),
@ -56,6 +123,8 @@ namespace Grid {
processors(grid->_processors),
processor_coor(grid->_processor_coor)
{
flops=0;
usec =0;
std::vector<int> layout(Nd,1);
sgrid = new GridCartesian(dimensions,layout,processors);
};
@ -75,55 +144,62 @@ namespace Grid {
std::vector<int> layout(Nd,1);
std::vector<int> pencil_gd(vgrid->_fdimensions);
std::vector<int> pencil_ld(processors);
pencil_gd[dim] = G*processors[dim];
pencil_ld[dim] = G*processors[dim];
// Pencil global vol LxLxGxLxL per node
GridCartesian pencil_g(pencil_gd,layout,processors);
GridCartesian pencil_l(pencil_ld,layout,processors);
// Construct pencils
typedef typename vobj::scalar_object sobj;
typedef typename sobj::scalar_type scalar;
Lattice<vobj> ssource(vgrid); ssource =source;
Lattice<sobj> pgsource(&pencil_g);
Lattice<sobj> pgresult(&pencil_g);
Lattice<sobj> plsource(&pencil_l);
Lattice<sobj> plresult(&pencil_l);
Lattice<sobj> pgresult(&pencil_g); pgresult=zero;
#ifndef HAVE_FFTW
assert(0);
#else
typedef typename FFTW<scalar>::FFTW_scalar FFTW_scalar;
typedef typename FFTW<scalar>::FFTW_plan FFTW_plan;
{
assert(sizeof(typename sobj::scalar_type)==sizeof(ComplexD));
assert(sizeof(fftw_complex)==sizeof(ComplexD));
assert(sizeof(fftw_complex)==sizeof(ComplexD));
int Ncomp = sizeof(sobj)/sizeof(scalar);
int Nlow = 1;
for(int d=0;d<dim;d++){
Nlow*=vgrid->_ldimensions[d];
}
int Ncomp = sizeof(sobj)/sizeof(fftw_complex);
int rank = 1; /* not 2: we are computing 1d transforms */
int rank = 1; /* 1d transforms */
int n[] = {G}; /* 1d transforms of length G */
int howmany = Ncomp;
int odist,idist,istride,ostride;
idist = odist = 1;
istride = ostride = Ncomp; /* distance between two elements in the same column */
idist = odist = 1; /* Distance between consecutive FT's */
istride = ostride = Ncomp*Nlow; /* distance between two elements in the same FT */
int *inembed = n, *onembed = n;
fftw_complex *in = (fftw_complex *)&plsource._odata[0];
fftw_complex *out= (fftw_complex *)&plresult._odata[0];
int sign = FFTW_FORWARD;
if (inverse) sign = FFTW_BACKWARD;
#ifdef HAVE_FFTW
fftw_plan p = fftw_plan_many_dft(rank,n,howmany,
in,inembed,
istride,idist,
out,onembed,
ostride, odist,
sign,FFTW_ESTIMATE);
#else
fftw_plan p ;
assert(0);
#endif
FFTW_plan p;
{
FFTW_scalar *in = (FFTW_scalar *)&pgsource._odata[0];
FFTW_scalar *out= (FFTW_scalar *)&pgresult._odata[0];
p = FFTW<scalar>::fftw_plan_many_dft(rank,n,howmany,
in,inembed,
istride,idist,
out,onembed,
ostride, odist,
sign,FFTW_ESTIMATE);
}
double add,mul,fma;
FFTW<scalar>::fftw_flops(p,&add,&mul,&fma);
flops_call = add+mul+2.0*fma;
std::cout << "FFT Flops per call "<<flops_call<<std::endl;
GridStopWatch timer;
// Barrel shift and collect global pencil
for(int p=0;p<processors[dim];p++) {
@ -146,43 +222,46 @@ namespace Grid {
}
// Loop over orthog coords
for(int idx=0;idx<sgrid->lSites();idx++) {
int NN=pencil_g.lSites();
GridStopWatch Timer;
Timer.Start();
PARALLEL_FOR_LOOP
for(int idx=0;idx<NN;idx++) {
std::vector<int> pcoor(Nd,0);
std::vector<int> lcoor(Nd);
sgrid->LocalIndexToLocalCoor(idx,lcoor);
pencil_g.LocalIndexToLocalCoor(idx,lcoor);
if ( lcoor[dim] == 0 ) { // restricts loop to plane at lcoor[dim]==0
// Project to local pencil array
for(int l=0;l<G;l++){
sobj s;
pcoor[dim]=l;
lcoor[dim]=l;
peekLocalSite(s,pgsource,lcoor);
pokeLocalSite(s,plsource,pcoor);
}
// FFT the pencil
#ifdef HAVE_FFTW
fftw_execute(p);
#endif
// Extract the result
for(int l=0;l<L;l++){
sobj s;
int p = processor_coor[dim];
lcoor[dim] = l;
pcoor[dim] = l+L*p;
peekLocalSite(s,plresult,pcoor);
pokeLocalSite(s,result,lcoor);
}
FFTW_scalar *in = (FFTW_scalar *)&pgsource._odata[idx];
FFTW_scalar *out= (FFTW_scalar *)&pgresult._odata[idx];
FFTW<scalar>::fftw_execute_dft(p,in,out);
}
}
fftw_destroy_plan(p);
Timer.Stop();
usec += Timer.useconds();
flops+= flops_call*NN;
int pc = processor_coor[dim];
for(int idx=0;idx<sgrid->lSites();idx++) {
std::vector<int> lcoor(Nd);
sgrid->LocalIndexToLocalCoor(idx,lcoor);
std::vector<int> gcoor = lcoor;
// extract the result
sobj s;
gcoor[dim] = lcoor[dim]+L*pc;
peekLocalSite(s,pgresult,gcoor);
pokeLocalSite(s,result,lcoor);
}
FFTW<scalar>::fftw_destroy_plan(p);
}
#endif
}
};

2
lib/Init.cc
View File

@ -153,6 +153,7 @@ void GridParseLayout(char **argv,int argc,
assert(ompthreads.size()==1);
GridThread::SetThreads(ompthreads[0]);
}
if( GridCmdOptionExists(argv,argv+argc,"--cores") ){
std::vector<int> cores(0);
arg= GridCmdOptionPayload(argv,argv+argc,"--cores");
@ -203,7 +204,6 @@ void Grid_init(int *argc,char ***argv)
GridLogConfigure(logstreams);
}
if( GridCmdOptionExists(*argv,*argv+*argc,"--debug-signals") ){
Grid_debug_handler_init();
}

412
lib/fftw/fftw3.h
View File

@ -1,412 +0,0 @@
/*
* Copyright (c) 2003, 2007-14 Matteo Frigo
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
*
* The following statement of license applies *only* to this header file,
* and *not* to the other files distributed with FFTW or derived therefrom:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/***************************** NOTE TO USERS *********************************
*
* THIS IS A HEADER FILE, NOT A MANUAL
*
* If you want to know how to use FFTW, please read the manual,
* online at http://www.fftw.org/doc/ and also included with FFTW.
* For a quick start, see the manual's tutorial section.
*
* (Reading header files to learn how to use a library is a habit
* stemming from code lacking a proper manual. Arguably, it's a
* *bad* habit in most cases, because header files can contain
* interfaces that are not part of the public, stable API.)
*
****************************************************************************/
#ifndef FFTW3_H
#define FFTW3_H
#include <stdio.h>
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/* If <complex.h> is included, use the C99 complex type. Otherwise
define a type bit-compatible with C99 complex */
#if !defined(FFTW_NO_Complex) && defined(_Complex_I) && defined(complex) && defined(I)
# define FFTW_DEFINE_COMPLEX(R, C) typedef R _Complex C
#else
# define FFTW_DEFINE_COMPLEX(R, C) typedef R C[2]
#endif
#define FFTW_CONCAT(prefix, name) prefix ## name
#define FFTW_MANGLE_DOUBLE(name) FFTW_CONCAT(fftw_, name)
#define FFTW_MANGLE_FLOAT(name) FFTW_CONCAT(fftwf_, name)
#define FFTW_MANGLE_LONG_DOUBLE(name) FFTW_CONCAT(fftwl_, name)
#define FFTW_MANGLE_QUAD(name) FFTW_CONCAT(fftwq_, name)
/* IMPORTANT: for Windows compilers, you should add a line
#define FFTW_DLL
here and in kernel/ifftw.h if you are compiling/using FFTW as a
DLL, in order to do the proper importing/exporting, or
alternatively compile with -DFFTW_DLL or the equivalent
command-line flag. This is not necessary under MinGW/Cygwin, where
libtool does the imports/exports automatically. */
#if defined(FFTW_DLL) && (defined(_WIN32) || defined(__WIN32__))
/* annoying Windows syntax for shared-library declarations */
# if defined(COMPILING_FFTW) /* defined in api.h when compiling FFTW */
# define FFTW_EXTERN extern __declspec(dllexport)
# else /* user is calling FFTW; import symbol */
# define FFTW_EXTERN extern __declspec(dllimport)
# endif
#else
# define FFTW_EXTERN extern
#endif
enum fftw_r2r_kind_do_not_use_me {
FFTW_R2HC=0, FFTW_HC2R=1, FFTW_DHT=2,
FFTW_REDFT00=3, FFTW_REDFT01=4, FFTW_REDFT10=5, FFTW_REDFT11=6,
FFTW_RODFT00=7, FFTW_RODFT01=8, FFTW_RODFT10=9, FFTW_RODFT11=10
};
struct fftw_iodim_do_not_use_me {
int n; /* dimension size */
int is; /* input stride */
int os; /* output stride */
};
#include <stddef.h> /* for ptrdiff_t */
struct fftw_iodim64_do_not_use_me {
ptrdiff_t n; /* dimension size */
ptrdiff_t is; /* input stride */
ptrdiff_t os; /* output stride */
};
typedef void (*fftw_write_char_func_do_not_use_me)(char c, void *);
typedef int (*fftw_read_char_func_do_not_use_me)(void *);
/*
huge second-order macro that defines prototypes for all API
functions. We expand this macro for each supported precision
X: name-mangling macro
R: real data type
C: complex data type
*/
#define FFTW_DEFINE_API(X, R, C) \
\
FFTW_DEFINE_COMPLEX(R, C); \
\
typedef struct X(plan_s) *X(plan); \
\
typedef struct fftw_iodim_do_not_use_me X(iodim); \
typedef struct fftw_iodim64_do_not_use_me X(iodim64); \
\
typedef enum fftw_r2r_kind_do_not_use_me X(r2r_kind); \
\
typedef fftw_write_char_func_do_not_use_me X(write_char_func); \
typedef fftw_read_char_func_do_not_use_me X(read_char_func); \
\
FFTW_EXTERN void X(execute)(const X(plan) p); \
\
FFTW_EXTERN X(plan) X(plan_dft)(int rank, const int *n, \
C *in, C *out, int sign, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_dft_1d)(int n, C *in, C *out, int sign, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_2d)(int n0, int n1, \
C *in, C *out, int sign, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_3d)(int n0, int n1, int n2, \
C *in, C *out, int sign, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_many_dft)(int rank, const int *n, \
int howmany, \
C *in, const int *inembed, \
int istride, int idist, \
C *out, const int *onembed, \
int ostride, int odist, \
int sign, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru_dft)(int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
C *in, C *out, \
int sign, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru_split_dft)(int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
R *ri, R *ii, R *ro, R *io, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru64_dft)(int rank, \
const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
C *in, C *out, \
int sign, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru64_split_dft)(int rank, \
const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
R *ri, R *ii, R *ro, R *io, \
unsigned flags); \
\
FFTW_EXTERN void X(execute_dft)(const X(plan) p, C *in, C *out); \
FFTW_EXTERN void X(execute_split_dft)(const X(plan) p, R *ri, R *ii, \
R *ro, R *io); \
\
FFTW_EXTERN X(plan) X(plan_many_dft_r2c)(int rank, const int *n, \
int howmany, \
R *in, const int *inembed, \
int istride, int idist, \
C *out, const int *onembed, \
int ostride, int odist, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_dft_r2c)(int rank, const int *n, \
R *in, C *out, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_dft_r2c_1d)(int n,R *in,C *out,unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_r2c_2d)(int n0, int n1, \
R *in, C *out, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_r2c_3d)(int n0, int n1, \
int n2, \
R *in, C *out, unsigned flags); \
\
\
FFTW_EXTERN X(plan) X(plan_many_dft_c2r)(int rank, const int *n, \
int howmany, \
C *in, const int *inembed, \
int istride, int idist, \
R *out, const int *onembed, \
int ostride, int odist, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_dft_c2r)(int rank, const int *n, \
C *in, R *out, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_dft_c2r_1d)(int n,C *in,R *out,unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_c2r_2d)(int n0, int n1, \
C *in, R *out, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_dft_c2r_3d)(int n0, int n1, \
int n2, \
C *in, R *out, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru_dft_r2c)(int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
R *in, C *out, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru_dft_c2r)(int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
C *in, R *out, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru_split_dft_r2c)( \
int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
R *in, R *ro, R *io, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru_split_dft_c2r)( \
int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
R *ri, R *ii, R *out, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru64_dft_r2c)(int rank, \
const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
R *in, C *out, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru64_dft_c2r)(int rank, \
const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
C *in, R *out, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru64_split_dft_r2c)( \
int rank, const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
R *in, R *ro, R *io, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_guru64_split_dft_c2r)( \
int rank, const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
R *ri, R *ii, R *out, \
unsigned flags); \
\
FFTW_EXTERN void X(execute_dft_r2c)(const X(plan) p, R *in, C *out); \
FFTW_EXTERN void X(execute_dft_c2r)(const X(plan) p, C *in, R *out); \
\
FFTW_EXTERN void X(execute_split_dft_r2c)(const X(plan) p, \
R *in, R *ro, R *io); \
FFTW_EXTERN void X(execute_split_dft_c2r)(const X(plan) p, \
R *ri, R *ii, R *out); \
\
FFTW_EXTERN X(plan) X(plan_many_r2r)(int rank, const int *n, \
int howmany, \
R *in, const int *inembed, \
int istride, int idist, \
R *out, const int *onembed, \
int ostride, int odist, \
const X(r2r_kind) *kind, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_r2r)(int rank, const int *n, R *in, R *out, \
const X(r2r_kind) *kind, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_r2r_1d)(int n, R *in, R *out, \
X(r2r_kind) kind, unsigned flags); \
FFTW_EXTERN X(plan) X(plan_r2r_2d)(int n0, int n1, R *in, R *out, \
X(r2r_kind) kind0, X(r2r_kind) kind1, \
unsigned flags); \
FFTW_EXTERN X(plan) X(plan_r2r_3d)(int n0, int n1, int n2, \
R *in, R *out, X(r2r_kind) kind0, \
X(r2r_kind) kind1, X(r2r_kind) kind2, \
unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru_r2r)(int rank, const X(iodim) *dims, \
int howmany_rank, \
const X(iodim) *howmany_dims, \
R *in, R *out, \
const X(r2r_kind) *kind, unsigned flags); \
\
FFTW_EXTERN X(plan) X(plan_guru64_r2r)(int rank, const X(iodim64) *dims, \
int howmany_rank, \
const X(iodim64) *howmany_dims, \
R *in, R *out, \
const X(r2r_kind) *kind, unsigned flags); \
\
FFTW_EXTERN void X(execute_r2r)(const X(plan) p, R *in, R *out); \
\
FFTW_EXTERN void X(destroy_plan)(X(plan) p); \
FFTW_EXTERN void X(forget_wisdom)(void); \
FFTW_EXTERN void X(cleanup)(void); \
\
FFTW_EXTERN void X(set_timelimit)(double t); \
\
FFTW_EXTERN void X(plan_with_nthreads)(int nthreads); \
FFTW_EXTERN int X(init_threads)(void); \
FFTW_EXTERN void X(cleanup_threads)(void); \
\
FFTW_EXTERN int X(export_wisdom_to_filename)(const char *filename); \
FFTW_EXTERN void X(export_wisdom_to_file)(FILE *output_file); \
FFTW_EXTERN char *X(export_wisdom_to_string)(void); \
FFTW_EXTERN void X(export_wisdom)(X(write_char_func) write_char, \
void *data); \
FFTW_EXTERN int X(import_system_wisdom)(void); \
FFTW_EXTERN int X(import_wisdom_from_filename)(const char *filename); \
FFTW_EXTERN int X(import_wisdom_from_file)(FILE *input_file); \
FFTW_EXTERN int X(import_wisdom_from_string)(const char *input_string); \
FFTW_EXTERN int X(import_wisdom)(X(read_char_func) read_char, void *data); \
\
FFTW_EXTERN void X(fprint_plan)(const X(plan) p, FILE *output_file); \
FFTW_EXTERN void X(print_plan)(const X(plan) p); \
FFTW_EXTERN char *X(sprint_plan)(const X(plan) p); \
\
FFTW_EXTERN void *X(malloc)(size_t n); \
FFTW_EXTERN R *X(alloc_real)(size_t n); \
FFTW_EXTERN C *X(alloc_complex)(size_t n); \
FFTW_EXTERN void X(free)(void *p); \
\
FFTW_EXTERN void X(flops)(const X(plan) p, \
double *add, double *mul, double *fmas); \
FFTW_EXTERN double X(estimate_cost)(const X(plan) p); \
FFTW_EXTERN double X(cost)(const X(plan) p); \
\
FFTW_EXTERN int X(alignment_of)(R *p); \
FFTW_EXTERN const char X(version)[]; \
FFTW_EXTERN const char X(cc)[]; \
FFTW_EXTERN const char X(codelet_optim)[];
/* end of FFTW_DEFINE_API macro */
FFTW_DEFINE_API(FFTW_MANGLE_DOUBLE, double, fftw_complex)
FFTW_DEFINE_API(FFTW_MANGLE_FLOAT, float, fftwf_complex)
FFTW_DEFINE_API(FFTW_MANGLE_LONG_DOUBLE, long double, fftwl_complex)
/* __float128 (quad precision) is a gcc extension on i386, x86_64, and ia64
for gcc >= 4.6 (compiled in FFTW with --enable-quad-precision) */
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) \
&& !(defined(__ICC) || defined(__INTEL_COMPILER)) \
&& (defined(__i386__) || defined(__x86_64__) || defined(__ia64__))
# if !defined(FFTW_NO_Complex) && defined(_Complex_I) && defined(complex) && defined(I)
/* note: __float128 is a typedef, which is not supported with the _Complex
keyword in gcc, so instead we use this ugly __attribute__ version.
However, we can't simply pass the __attribute__ version to
FFTW_DEFINE_API because the __attribute__ confuses gcc in pointer
types. Hence redefining FFTW_DEFINE_COMPLEX. Ugh. */
# undef FFTW_DEFINE_COMPLEX
# define FFTW_DEFINE_COMPLEX(R, C) typedef _Complex float __attribute__((mode(TC))) C
# endif
FFTW_DEFINE_API(FFTW_MANGLE_QUAD, __float128, fftwq_complex)
#endif
#define FFTW_FORWARD (-1)
#define FFTW_BACKWARD (+1)
#define FFTW_NO_TIMELIMIT (-1.0)
/* documented flags */
#define FFTW_MEASURE (0U)
#define FFTW_DESTROY_INPUT (1U << 0)
#define FFTW_UNALIGNED (1U << 1)
#define FFTW_CONSERVE_MEMORY (1U << 2)
#define FFTW_EXHAUSTIVE (1U << 3) /* NO_EXHAUSTIVE is default */
#define FFTW_PRESERVE_INPUT (1U << 4) /* cancels FFTW_DESTROY_INPUT */
#define FFTW_PATIENT (1U << 5) /* IMPATIENT is default */
#define FFTW_ESTIMATE (1U << 6)
#define FFTW_WISDOM_ONLY (1U << 21)
/* undocumented beyond-guru flags */
#define FFTW_ESTIMATE_PATIENT (1U << 7)
#define FFTW_BELIEVE_PCOST (1U << 8)
#define FFTW_NO_DFT_R2HC (1U << 9)
#define FFTW_NO_NONTHREADED (1U << 10)
#define FFTW_NO_BUFFERING (1U << 11)
#define FFTW_NO_INDIRECT_OP (1U << 12)
#define FFTW_ALLOW_LARGE_GENERIC (1U << 13) /* NO_LARGE_GENERIC is default */
#define FFTW_NO_RANK_SPLITS (1U << 14)
#define FFTW_NO_VRANK_SPLITS (1U << 15)
#define FFTW_NO_VRECURSE (1U << 16)
#define FFTW_NO_SIMD (1U << 17)
#define FFTW_NO_SLOW (1U << 18)
#define FFTW_NO_FIXED_RADIX_LARGE_N (1U << 19)
#define FFTW_ALLOW_PRUNING (1U << 20)
#ifdef __cplusplus
} /* extern "C" */
#endif /* __cplusplus */
#endif /* FFTW3_H */

19
tests/core/Test_fft.cc
View File

@ -35,6 +35,9 @@ int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
int threads = GridThread::GetThreads();
std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
std::vector<int> latt_size = GridDefaultLatt();
std::vector<int> simd_layout( { vComplexD::Nsimd(),1,1,1});
std::vector<int> mpi_layout = GridDefaultMpi();
@ -75,10 +78,10 @@ int main (int argc, char ** argv)
FFT theFFT(&Fine);
theFFT.FFT_dim(Ctilde,C,0,FFT::forward); C=Ctilde;
theFFT.FFT_dim(Ctilde,C,1,FFT::forward); C=Ctilde;
theFFT.FFT_dim(Ctilde,C,2,FFT::forward); C=Ctilde;
theFFT.FFT_dim(Ctilde,C,3,FFT::forward);
theFFT.FFT_dim(Ctilde,C,0,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,1,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,2,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,3,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
// C=zero;
// Ctilde = where(abs(Ctilde)<1.0e-10,C,Ctilde);
@ -90,10 +93,10 @@ int main (int argc, char ** argv)
C=C-Ctilde;
std::cout << "diff scalar "<<norm2(C) << std::endl;
theFFT.FFT_dim(Stilde,S,0,FFT::forward); S=Stilde;
theFFT.FFT_dim(Stilde,S,1,FFT::forward); S=Stilde;
theFFT.FFT_dim(Stilde,S,2,FFT::forward); S=Stilde;
theFFT.FFT_dim(Stilde,S,3,FFT::forward);
theFFT.FFT_dim(Stilde,S,0,FFT::forward); S=Stilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,1,FFT::forward); S=Stilde;std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,2,FFT::forward); S=Stilde;std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,3,FFT::forward);std::cout << theFFT.MFlops()<<std::endl;
SpinMatrixD Sp;
Sp = zero; Sp = Sp+cVol;

111
tests/core/Test_fftf.cc Normal file
View File

@ -0,0 +1,111 @@
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_cshift.cc
Copyright (C) 2015
Author: Azusa Yamaguchi <ayamaguc@staffmail.ed.ac.uk>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Grid/Grid.h>
using namespace Grid;
using namespace Grid::QCD;
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
int threads = GridThread::GetThreads();
std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
std::vector<int> latt_size = GridDefaultLatt();
std::vector<int> simd_layout( { vComplexF::Nsimd(),1,1,1});
std::vector<int> mpi_layout = GridDefaultMpi();
int vol = 1;
for(int d=0;d<latt_size.size();d++){
vol = vol * latt_size[d];
}
GridCartesian Fine(latt_size,simd_layout,mpi_layout);
LatticeComplexF one(&Fine);
LatticeComplexF zz(&Fine);
LatticeComplexF C(&Fine);
LatticeComplexF Ctilde(&Fine);
LatticeComplexF coor(&Fine);
LatticeSpinMatrixF S(&Fine);
LatticeSpinMatrixF Stilde(&Fine);
std::vector<int> p({1,2,3,2});
one = ComplexF(1.0,0.0);
zz = ComplexF(0.0,0.0);
ComplexF ci(0.0,1.0);
C=zero;
for(int mu=0;mu<4;mu++){
RealD TwoPiL = M_PI * 2.0/ latt_size[mu];
LatticeCoordinate(coor,mu);
C = C - (TwoPiL * p[mu]) * coor;
}
C = exp(C*ci);
S=zero;
S = S+C;
FFT theFFT(&Fine);
theFFT.FFT_dim(Ctilde,C,0,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,1,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,2,FFT::forward); C=Ctilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Ctilde,C,3,FFT::forward); std::cout << theFFT.MFlops()<<std::endl;
// C=zero;
// Ctilde = where(abs(Ctilde)<1.0e-10,C,Ctilde);
TComplexF cVol;
cVol()()() = vol;
C=zero;
pokeSite(cVol,C,p);
C=C-Ctilde;
std::cout << "diff scalar "<<norm2(C) << std::endl;
theFFT.FFT_dim(Stilde,S,0,FFT::forward); S=Stilde; std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,1,FFT::forward); S=Stilde;std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,2,FFT::forward); S=Stilde;std::cout << theFFT.MFlops()<<std::endl;
theFFT.FFT_dim(Stilde,S,3,FFT::forward);std::cout << theFFT.MFlops()<<std::endl;
SpinMatrixF Sp;
Sp = zero; Sp = Sp+cVol;
S=zero;
pokeSite(Sp,S,p);
S= S-Stilde;
std::cout << "diff FT[SpinMat] "<<norm2(S) << std::endl;
Grid_finalize();
}